$ git clone -n https://gitee.com/llvm-la/llvm.git /var/lib/mock/dist-an23-build-302398-65989/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-302398-65989/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 9a7de0e087653192ab934c23c23d7bc800d11d53:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/llvm
 * [new ref]         9a7de0e087653192ab934c23c23d7bc800d11d53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a7de0e [LoongArch] Backport patches